Patents by Inventor Erich Kettler

Erich Kettler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus for producing casting molds
    Patent number: 4000772
    Abstract: The upper part of a casting mold is produced in apparatus which includes a mold table and a mold presser plate between which the casting mold is compressed. A pattern plate is positioned on the mold table and a feed hopper introduces mold forming material into a mold box arranged on the mold table. The feed hopper includes a premolding member which has a location and dimensions generally corresponding with a sink pattern member located on the presser plate in order to form a depression for a sink in the upper part of the mold. A sprue is formed by means extending between the pattern plate and the sink pattern member which includes a compressible spring which is compressed by the sink pattern member when the mold is compressed between the presser plate and the mold table.
    Type: Grant
    Filed: January 30, 1976
    Date of Patent: January 4, 1977
    Assignee: Georg Fischer Aktiengesellschaft
    Inventor: Erich Kettler